愚者の黄金
If this is the first time you played a Fool's Gold this turn, +1 Coin, otherwise +4 Coin.
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When another player gains a Province, you may trash this from your hand, to gain a Gold onto your deck.
Fool's Gold is a Treasure-Reaction from Hinterlands, and it is the only Treasure-Reaction card in the game. Despite only costing 2 Coin, Fool's Gold is a card which gets progressively more powerful the more of them are played together.